Código:
Mil gracias señores. <html> <title>Proj</title> <head> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin var x; var z; z=prompt("Numero de veces",""); for (x = 1; x < z; x++){ closetime = 3; // Close window after __ number of seconds? // 0 = do not close, anything else = number of seconds function Start(URL, WIDTH, HEIGHT) { windowprops = "left=50,top=50,width=" + WIDTH + ",height=" + HEIGHT; preview = window.open(URL, "preview", windowprops); if (closetime) setTimeout("preview.close();", closetime*1000); } function doPopup() { url = "http://www.google.es"; width = 267; // width of window in pixels height = 103; // height of window in pixels delay = 2; // time in seconds before popup opens timer = setTimeout("Start(url, width, height)", delay*1000); } } // End --> </script> <body> <BODY OnLoad="doPopup();"> </body> </html>